CN105195843A - Electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining) - Google Patents
Electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining) Download PDFInfo
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- CN105195843A CN105195843A CN201510566991.4A CN201510566991A CN105195843A CN 105195843 A CN105195843 A CN 105195843A CN 201510566991 A CN201510566991 A CN 201510566991A CN 105195843 A CN105195843 A CN 105195843A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
- B23H7/08—Wire electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
- B23H7/30—Moving electrode in the feed direction
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Abstract
The invention provides an electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining). The method and the device are characterized in that an electrode wire is controlled to perform continuous reciprocating motion, the advancing length is slightly larger than the retreating length each time, and by means of unequivalence of reciprocating wire winding, electrode wire loss is offset through whole micro propulsion of the electrode wire. The device is realized by adopting a double-wire-cylinder structure. A certain number (such as 1 mm) of new wires are always supplemented in each loop, so that the electrode wire loss is offset by the newly supplemented electrode wires (such as 1 mm) each time, the electrode wire loss in a machining process can be reduced, particularly, the effect is more obvious when a workpiece with high thickness and large cutting area is cut, and accordingly, the machining precision is improved; when a wire breaking phenomenon happens, the electrode wire can be subjected to void-cut to a wire breaking point along cutting joints with consistent width or performs in-situ wire penetration at the wire breaking point, and the machining efficiency is greatly improved.
Description
Technical field
The present invention relates to a kind of to-and-fro thread feed electric spark line cutting technology, specifically the reciprocal gradual wire-walking method of a kind of Wire EDM wire electrode and device.
Background technology
High speed to-and-fro thread feed electric spark Linear cut (HSWEDM) is the Wire-cut Electrical Discharge Machining equipment that China has complete independent intellectual property rights, because it has very high cost performance, has been widely used in the field such as precision component and Mould Machining.Current high speed to-and-fro thread feed electric spark wire-electrode cutting machine adopts to-and-fro thread mode, and this wire mode silk cylinder powers on polar filament can Reusability, and operating cost is low, but also there is following defect thus:
(1) the silk cylinder wrapping wire method adopted at present, the length usually once going up silk is 200-300m, because this segment electrode silk is always in cutting of back and forth discharging, therefore certainly exists electronic wire loss, usually often cuts 100,000 mm at present
2, wire electrode diameter loss 0.01mm, therefore when large area is cut, causes initial joint-cutting different from the width of final joint-cutting the loss due to wire electrode, has an impact to cutting accuracy.
(2) in large area cutting process once there is fracture of wire phenomenon, due to wire electrode from had loss to fracture of wire place, if therefore now adopt and return former cutpoint, again the method that molybdenum filament carries out cutting again is changed, will because of from cutpoint narrow gradually to the width of slit of fracture of wire point, and affect wire electrode from cutpoint to the feed speed of fracture of wire point, that is, now from cutpoint be not cut-in without ball to fracture of wire point, but need again to cut and could arrive fracture of wire point, will greatly extend total clipping time like this.
(3) traditional HSWEDM is in wire process, there is screws loosing at single side problem, namely at two of silk cylinder, there is the problem that wire electrode pine one is tight, although the constant tension device adopted at present is (as mechanical Weight type tension mechanism, mechanical spring type tension mechanism etc.) can this problem of partial rcsponse, but also can increase the probability of fracture of wire simultaneously.
Summary of the invention
The object of the invention is for current high speed to-and-fro thread feed electric spark Linear cut (HSWEDM) lathe at cutting heavy thickness, during large cutting area work, wire electrode produces loss and then affects machining accuracy, with to return when there is fracture of wire in cutting process on initial point silk cutting can because joint-cutting narrow can not cut-in without ball and delay and get back to fracture of wire point and extend process time, and the current ubiquitous screws loosing at single side problem of wire-moving system, invent the reciprocal gradual wire-walking method of a kind of Wire EDM wire electrode and device, it makes wire electrode complete the motion of high speed to-and-fro thread on the one hand by mariages cylinder, simultaneously by the not equity of to-and-fro thread, the overall trace of wire electrode is advanced, to offset the loss of wire electrode, thus make in whole cutting process, the loss of wire electrode is offset by the progressive propelling of overall electrode silk, ensure in large area cutting, wire electrode diameter in joint-cutting is substantially constant, thus ensured that machining accuracy can not be lost because of the loss of wire electrode, and wire electrode can switch to fracture of wire point or wear silk in fracture of wire point original place along the joint-cutting Quick air that width is consistent when fracture of wire situation occurs.In addition, mariages barrel structure has ensured that the tension force of machining area wire electrode is in steady state.
One of technical scheme of the present invention is:
The reciprocal gradual wire-walking method of a kind of Wire EDM wire electrode, is characterized in that it comprises the following steps:
First, arrange two silk cylinders, one of them is as while wire drawing tube, and another puts silk cylinder as what have a damping;
Secondly, under controlling organization controls, a silk cylinder is made to rotate forward (clockwise) as wire drawing tube, another cylinder is as putting silk cylinder and producing resistance, the wire electrode between two silk cylinders is made to form required tension force, after putting silk cylinder forward rotating movements and reaching the wire electrode length of setting, the silk cylinder of original rotating forward stops operating, the silk cylinder originally putting silk carries out (counterclockwise) receipts silk that reverses under the drive of motor, and the silk cylinder originally rotated forward also produces corresponding resistance when to put thread, make the tension force of wire electrode generation needed for counter motion, repetition like this, the wire electrode length of each forward rotating movements of control electrode silk is greater than the length of each reversion wire electrode motion, by back and forth not to equal length, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.
The difference of the length of each wire electrode forward rotating movements and the length of wire electrode return motion can regulate according to processing situation, and difference range is 0.001-1 rice.
The length of described wire electrode is 1000-20000 rice.
The mariages cylinder mechanism adopted, each cylinder all can multi-laminate silk, and silk cylinder both sides are respectively equipped with bossing thus ensure that the wire electrode on upper strata can not landing; Main shaft is connected with servomotor by shaft coupling, and servomotor is controlled by the turn signal of the silk cylinder of controller and signal picker collection; The distance that controller control silk cylinder rotates forward is greater than counter-rotational distance, thus passes through the not equity of to-and-fro thread, and the trace realizing wire electrode advances, to offset the loss of wire electrode.
When a silk cylinder in two described silk cylinders rotates under drive motors drives, the resistance needed for another cylinder produces realizes controlling the tension force of wire electrode.
Two of technical scheme of the present invention is:
The gradual wire drive device of a kind of Wire EDM wire electrode, it is characterized in that it adopts mariages cylinder mechanism, each cylinder all energy multi-laminate silks, silk cylinder and main shaft adopt sliding bearing to be connected, silk cylinder both sides are respectively equipped with bossing thus ensure that the wire electrode on upper strata can not landing, one end and the cam of silk cylinder offset, to ensure that silk cylinder contacts with the outline of cam all the time, the other end and spring offset, cam often turns around, silk cylinder realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam and spring, thus ensure that wire electrode evenly can arrange silk on silk cylinder, cam is driven by worm-and-wheel gear, and worm screw is coaxial with main shaft, and main shaft is connected with servomotor by shaft coupling, and servomotor is controlled by the turn signal of the silk cylinder of controller and signal picker collection, the distance that controller controls silk cylinder positive movement is greater than counter motion distance, thus passes through the not equity of to-and-fro thread, and the trace realizing wire electrode advances, to offset the loss of wire electrode.
The worm gear of described worm-and-wheel gear is coaxially connected with same shaft bevel gears, engages and drive cam shaft is rotated with shaft bevel gears with the driving bevel gear on camshaft.
When a silk cylinder in two described silk cylinders rotates under drive motors drives, the resistance needed for another cylinder produces realizes controlling the tension force of wire electrode.
The difference of described positive movement Distance geometry counter motion distance is at least 1 millimeter.
Beneficial effect of the present invention:
The present invention, by the turn signal of signal picker feedback silk cylinder, utilizes computer-controlled servo motor band movable wire cylinder to rotate and reverse, realizes the gradual motion of wire electrode " advance-rollback-readvance ".Because silk cylinder can multi-laminate silk, so the length of wire electrode does not limit, and have employed mariages barrel structure, ensured that the tension force of machining area wire electrode is in steady state; Simultaneously by the not equity of to-and-fro thread, the overall trace of wire electrode is advanced, thus make in whole cutting process, the loss of wire electrode can be offset by the feeding of overall electrode silk, ensure in the cutting of large thickness and area, the loss of wire electrode in certain controlled range, thus has ensured the machining accuracy of lathe to a certain extent; When fracture of wire situation occurs, used wire electrode before only needing to abandon breakpoint, change a new silk cylinder and carry out receipts silk, and fracture of wire rear electrode silk can switch to fracture of wire point or wear silk in fracture of wire point original place along the joint-cutting Quick air that width is consistent, substantially increase working (machining) efficiency.
The every circulation primary of the present invention just has at least the new silk of some (as 1mm) to supplement into participation cutting, thus the loss of wire electrode at every turn just by the 1mm(that receives or other setting value more) wire electrode accomplishes, so the loss of wire electrode in process can be reduced, especially the workpiece effect for the high thickness of cutting and large cutting area is more obvious, thus raising machining accuracy, and when fracture of wire phenomenon occurs, wire electrode can switch to fracture of wire point or wear silk in fracture of wire point original place along the joint-cutting Quick air that width is consistent, substantially increase working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is mariages cylinder of the present invention gradual to-and-fro thread mode schematic diagram.
Fig. 2 is the to-and-fro thread structural scheme of mechanism of the embodiment of the present invention.
Fig. 3 is the molded line schematic diagram of the cam matched with Fig. 2.
L=300m, δ in Fig. 1=1mm, hollow arrow is driving wheel, and filled arrows is driven pulley.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
Embodiment one.
As shown in Figure 1.
The gradual wire-walking method of a kind of Wire EDM wire electrode, its essence is that control electrode silk does continuous reciprocating motion, and each length of advancing always than the length retreated greatly a bit, by the not equity of to-and-fro thread, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.Specific practice is:
First, arrange two silk cylinders, one of them is as while wire drawing tube, and another puts silk cylinder as what have a damping;
Secondly, as shown in Figure 1, under controlling organization controls, under shilling, silk cylinder rotates forward as driving wheel, go up silk cylinder as driven pulley produces resistance simultaneously, the wire electrode between two silk cylinders is made to form required tension force, this at present silk cylinder be wire drawing tube, upper silk cylinder is for putting silk cylinder, after wire electrode positive movement reaches the distance L+ δ of setting, the silk cylinder of original rotating forward stops operating, the upper silk cylinder originally putting silk becomes driving wheel and carries out receipts silk under the drive of motor, and the lower silk cylinder originally rotated forward becomes driven pulley also produces corresponding resistance when to put thread, make the tension force of wire electrode generation needed for counter motion, now wire electrode counter motion distance is L.Repetition like this, the distance of each positive movement of control electrode silk is greater than each heterodromous distance, namely (span is between 0.001-1 rice to each circulation forward travel distance δ, value in Fig. 1 is 1 millimeter), by back and forth not reciprocity wire, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.
The gradual wire mode of Wire EDM wire electrode described in utilization, realize workpiece especially to heavy thickness and large processing of cutting the workpiece of area, effectively can reduce and the loss of control electrode silk in process, thus improve the machining accuracy of lathe to a certain extent; When fracture of wire situation occurs, used wire electrode before only needing to abandon breakpoint, change a new silk cylinder and carry out receipts silk, and because the loss of wire electrode is very little, wire electrode can switch to fracture of wire point or wear silk in fracture of wire point original place along the joint-cutting Quick air that width is consistent, improve working (machining) efficiency.
Embodiment two.
As Fig. 2,3
The gradual wire-walking method of a kind of Wire EDM wire electrode, its essence is that control electrode silk does continuous reciprocating motion, and each length of advancing always than the length retreated greatly a bit, by the not equity of to-and-fro thread, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.Specific practice is:
First, arrange two silk cylinders, one of them is as while wire drawing tube, and another puts silk cylinder as what have a damping;
Secondly, offset with its cam moved axially of promotion while one end of two silk cylinders is all connected with corresponding drive motors, the other end of two silk cylinders is all offseted with a spring; Under the acting in conjunction of cam and spring, wire electrode evenly automatically arranges silk on silk cylinder;
3rd, under controlling organization controls, a silk cylinder is rotated forward as wire drawing tube, another cylinder is as putting silk cylinder and producing resistance, the wire electrode between two silk cylinders is made to form required tension force, when putting after silk cylinder positive movement reaches the distance of setting, the silk cylinder of original rotating forward stops operating, the silk cylinder originally putting silk carries out receipts silk under the drive of motor, and the silk cylinder originally rotated forward also produces corresponding resistance when to put thread, make the tension force of wire electrode generation needed for counter motion, repetition like this, the distance of each positive movement of control electrode silk is greater than each heterodromous distance, by reciprocal not reciprocity raw silk rings, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.
As shown in Figure 2, the present invention adopts mariages cylinder mechanism, silk cylinder 21,17 can multi-laminate silk, silk cylinder and main shaft adopt sliding bearing to be connected, silk cylinder both sides are designed with bossing respectively thus ensure that the wire electrode on upper strata can not landing, silk cylinder has one week bossing near cam end, to ensure that silk cylinder contacts with the outline of heart-shaped cam all the time.In theory, this cylinder can meet the storage silk requirement of indefinite length wire electrode, and the actual wire electrode length selected is 1000m-20000m.Worm-and-wheel gear 5,15 and intermeshing bevel gear 23,24 and 9,10, the rotary motion of main shaft is passed to cam 25,7 according to certain gearratio, wherein bevel gear 23,9 respectively with worm gear 5,15 coaxial, bevel gear 24,10 engages with bevel gear 23,9 respectively, bevel gear 24,10 respectively with cam 25,7 coaxial.The shape of described cam 25,7 designs according to the size of silk cylinder 21,17 and the diameter of wire electrode 19, cam 25,7 often turns around, silk cylinder 21,17 realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam 25,7 and spring 20,18, thus ensure that wire electrode evenly can arrange silk on silk cylinder.Silk cylinder is sleeved on main shaft by singly-bound or spline structure, to ensure that silk cylinder can rotate again while doing to move axially on main shaft under the drive of spline structure, realizes receiving silk and putting silk.Signal picker 1,11(can adopt encoder or coding disk) turn signal of two silk cylinders is passed to computer respectively, by computer-controlled servo motor 2,12 forward and reverse.Described servomotor 2 rotates forward from the beginning, thus silk received by silk cylinder 21, now silk cylinder 17 is as putting silk cylinder, and form the moment of resistance, thus the tension force of control electrode silk 19, wire electrode 19 positive movement 300.001m, signal picker 11, 1 Real-time Collection also feeds back the motor message of upper and lower two silk cylinders, when reaching commutation and requiring, computer-controlled servo motor 2 reverses, silk received by silk cylinder 17, silk cylinder 21 is put silk and forms the moment of resistance, now silk cylinder 17 is as wire drawing tube, silk cylinder 21 is as putting silk cylinder, wire electrode 19 counter motion 300 meters, constantly repeat above process, thus realize the gradual motion of " advance-rollback-readvance " advanced generally again while that wire electrode moving in circles on the one hand.In wire transporting process, tension force is determined by the moment of resistance of computer settings thus has been ensured the constant of wire electrode tension.300m and 1mm is herein assumed value, and other suitable numerical value is also protection right of the present invention.
So-called gradual wire transporting: be exactly such as: control electrode silk advance 300.001m, retreat 300m, readvance 300.001 meters, retreat 300 meters, constantly repeat above process, in each to-and-fro thread process, the iterative motion that the overall formula that wire electrode realizes totally pushing ahead 1mm at every turn and carries out is advanced.The both sides of two wire storage tubes 21,17 of the present invention are designed with bossing respectively thus ensure wire electrode multi-laminate silk, and in theory, this wire storage tube can meet the storage silk requirement of indefinite length wire electrode.Worm-and-wheel gear 5,15 and intermeshing bevel gear 23,24 and 9,10, the rotary motion of main shaft is passed to cam 25,7 according to certain gearratio, wherein bevel gear 23,9 respectively with worm gear 5,15 coaxial, bevel gear 24,10 engages with bevel gear 23,9 respectively, bevel gear 24,10 respectively with cam 25,7 coaxial.The shape of described cam 25,7 designs according to the size of wire storage tube 21,17 and the diameter of wire electrode 19, cam 25,7 often turns around, wire storage tube 21,17 realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam 25,7 and spring 20,18, thus ensure that wire electrode evenly can arrange silk on wire storage tube.The turn signal of two wire storage tubes is passed to computer by signal picker 1,11 respectively that be arranged on two main shafts, carries out forward and reverse by computer-controlled servo motor 2,12.Described servomotor 2 rotates forward from the beginning, thus wire storage tube 21 receives silk, now wire storage tube 17 is as putting silk cylinder, and form the moment of resistance, thus the tension force of control electrode silk 19, wire electrode 19 positive movement 300.001m, signal picker 11, 1 Real-time Collection also feeds back the motor message of upper and lower two wire storage tubes, when reaching commutation and requiring, computer-controlled servo motor 2 reverses, wire storage tube 17 receives silk, wire storage tube 21 is put silk and is formed the moment of resistance, now wire storage tube 17 is as wire drawing tube, wire storage tube 21 is as putting silk cylinder, wire electrode 19 counter motion 300 meters, constantly repeat above process, thus realize wire electrode and move in circles on the one hand but the gradual motion of " advance-rollback-readvance " of simultaneously totally advance again (between each circulation advance 1mm-1 rice).In wire transporting process, tension force is determined by the moment of resistance of computer settings thus has been ensured the constant of wire electrode tension.
Embodiment three.
As Figure 2-3.
The gradual wire drive device of a kind of Wire EDM wire electrode, it adopts mariages cylinder mechanism, it comprises wire electrode 19, silk cylinder 21, 17, servomotor 2, 12, encoder 1, 11, shaft coupling 3, 13, bearing 4, 6, 14, 16, worm and gear 5, 15, bevel gear 23, 24, 9, 10, cam 25, 7, gear shaft 22, 8 and spring 20, 18, two silk cylinders 17, 21 equal energy multi-laminate silks, silk cylinder 17, 21 adopt sliding bearing to be connected with main shaft, silk cylinder both sides are respectively equipped with bossing thus ensure that the wire electrode on upper strata can not landing, one end and the cam of silk cylinder offset, to ensure that silk cylinder contacts with the outline of cam all the time, the other end and spring offset, cam often turns around, silk cylinder realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam and spring, thus ensure that wire electrode evenly can arrange silk on silk cylinder, silk cylinder is sleeved on main shaft by singly-bound or spline structure, to ensure that silk cylinder can rotate again while doing to move axially on main shaft under the drive of spline structure, realizes receiving silk and putting silk.Cam is driven by worm-and-wheel gear, and worm screw is coaxial with main shaft, and main shaft is connected with servomotor by shaft coupling, and servomotor is controlled by the turn signal of the silk cylinder of controller and signal picker collection; The distance that controller controls silk cylinder positive movement is greater than counter motion distance, thus passes through the not equity of to-and-fro thread, and the trace realizing wire electrode advances, to offset the loss of wire electrode.As shown in Figure 2, encoder 11,1 is arranged on the main shaft of servomotor; Wherein, described silk cylinder can multi-laminate silk, silk cylinder and main shaft adopt sliding bearing to be connected, silk cylinder both sides are designed with bossing respectively thus ensure that the wire electrode on upper strata can not landing, silk cylinder has one week bossing near cam end, to ensure that silk cylinder contacts with the outline of heart-shaped cam (as Fig. 3) all the time.Silk cylinder diameter is 158mm; the protective bulkhead height of both sides projection is 25mm; silk cylinder width (not comprising bossing) is 50mm; wire electrode selects diameter to be the molybdenum filament of 0.18mm; row's flight lead is 0.25mm; on such silk cylinder, every layer can be enclosed wire electrodes around 200, altogether can around about 100 layers, and wire electrode total length is about 10000m.Described worm-and-wheel gear 5,15 and intermeshing bevel gear 23,24 and 9,10, the rotary motion of main shaft is passed to cam 25,7 according to certain gearratio, wherein bevel gear 23,9 respectively with worm gear 5,15 coaxial, bevel gear 24,10 engages with bevel gear 23,9 respectively, bevel gear 24,10 respectively with cam 25,7 coaxial.The gearratio of worm and gear 5,15 is 80, bevel gear 23 and 24, and the gearratio of 9 and 10 is 5, the resultant gear ratio of whole like this mechanism is 400, just in time realize cam to circle, silk cylinder turns 400 circles, namely cam turn around band movable wire cylinder move back and forth once while wire electrode just in time arranged two-layer silk.Make row's silk of wire electrode even, cam must drive wire storage tube to do and at the uniform velocity move back and forth, and the shape of cam must be determined according to row's flight lead of silk cylinder size and wire electrode.The design of cam is as shown in Figure 2: getting radius of cam base-circle is 40mm, then the outer contour equation of cam is expressed as in polar coordinate system: ρ=(40+50 θ/π) mm(0< θ < π), as π < θ <2 π, symmetrical.Cam 25,7 often turns around, and wire storage tube 21,17 realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam 25,7 and spring 20,18, thus ensure that wire electrode evenly can arrange silk on wire storage tube.
The control procedure of the gradual motion mode of wire electrode adopts the encoder of 10 to be arranged on the main shaft of servomotor as signal picker, then the motion control accuracy of servomotor is: 158 pi/2s
10=0.48mm, the increase wrapping wire diameter along with the number of plies becomes large, so control accuracy is approximately 0.5mm, can meet the reciprocating required precision of wire electrode.Provide the model discussion of electronic wire loss below: with the wire electrode of length 300m, with the cutting speed of 10m/s and 100mm
2the cutting efficiency cut workpiece of/min, then often cut 10
5mm
2workpiece, electronic wire loss 0.01mm.The present invention utilizes 10 encoder Real-time Collections and feeds back the motor message of upper and lower two cylinders, servomotor 2 rotates forward from the beginning, and silk received by silk cylinder 21, and now silk cylinder 17 is as putting silk cylinder and forming the moment of resistance, thus the tension force of control electrode silk 19, wire electrode 19 positive movement 300.001m.Suppose that the number of plies at wire electrode place is k, wire electrode is the molybdenum filament of diameter 0.18mm, silk cylinder diameter is 158mm, as wire electrode 19 positive movement 300.001m, namely when silk cylinder 17 rotates forward 600002/ (158+0.18k) angle, computer obtains the commutation signal that encoder sends, and then control servomotor 2 reverses, silk received by silk cylinder 17, and silk cylinder 21 is put silk and formed the moment of resistance; As wire electrode 19 counter motion 300m, namely when silk cylinder 17 rotates backward 600000/ (158+0.18k) angle, computer obtains the commutation signal that encoder is sent again, and then control servomotor 17 rotates forward, constantly repeat above process, in front 4 circulations, the relation of the angle θ that silk cylinder 17 turns over and time t and the processing sketch of whole mechanism are as shown in Figure 3.Each circulating electrode silk supplements into the new silk of 1mm, substitute into the model of above-mentioned foundation, this segment electrode silk loss 0.01mm can be obtained, and the discharging gap of process is 10 μm, so the waste of wire electrode meets processing request, original place can be realized after fracture of wire and wear silk.Wherein 300m and 1mm can sets itself, and the selection of its numerical value should can make the loss of wire electrode meet the demands after the above-mentioned model of substitution.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (10)
1. the reciprocal gradual wire-walking method of Wire EDM wire electrode, is characterized in that it comprises the following steps:
First, arrange two silk cylinders, one of them is as while wire drawing tube, and another puts silk cylinder as what have a damping;
Secondly, under controlling organization controls, a silk cylinder is made to rotate forward (clockwise) as wire drawing tube, another cylinder is as putting silk cylinder and producing resistance, the wire electrode between two silk cylinders is made to form required tension force, after putting silk cylinder forward rotating movements and reaching the wire electrode length of setting, the silk cylinder of original rotating forward stops operating, the silk cylinder originally putting silk carries out (counterclockwise) receipts silk that reverses under the drive of motor, and the silk cylinder originally rotated forward also produces corresponding resistance when to put thread, make the tension force of wire electrode generation needed for counter motion, repetition like this, the wire electrode length of each forward rotating movements of control electrode silk is greater than the length of each reversion wire electrode motion, by back and forth not to equal length wire transporting, the overall trace of wire electrode is advanced, to offset the loss of wire electrode.
2. method according to claim 1, is characterized in that the described length of each wire electrode forward rotating movements and the difference 0.001-1 rice of the length of wire electrode return motion.
3. method according to claim 1, is characterized in that the length of described wire electrode is 1000-20000 rice.
4. method according to claim 1, is characterized in that it adopts mariages cylinder mechanism, and each cylinder all can multi-laminate silk, and silk cylinder both sides are respectively equipped with bossing thus ensure that the wire electrode on upper strata can not landing; Main shaft is connected with servomotor by shaft coupling, and servomotor is controlled by the turn signal of the silk cylinder of controller and signal picker collection; The distance that controller control silk cylinder rotates forward is greater than counter-rotational distance, thus passes through the not equity of to-and-fro thread, and the trace realizing wire electrode advances, to offset the loss of wire electrode.
5. method according to claim 1, when it is characterized in that a silk cylinder in two described silk cylinders rotates under drive motors drives, the resistance needed for another cylinder produces realizes controlling the tension force of wire electrode.
6. method according to claim 1, considers and is convenient to change electric wire, and two silk cylinders adopt the mode being enclosed within silk cylinder main shaft, and can take off.
7. the gradual wire drive device of Wire EDM wire electrode, it is characterized in that it adopts mariages cylinder mechanism, each cylinder all energy multi-laminate silks, silk cylinder and main shaft adopt sliding bearing to be connected, silk cylinder both sides are respectively equipped with bossing thus ensure that the wire electrode on upper strata can not landing, one end and the cam of silk cylinder offset, to ensure that silk cylinder contacts with the outline of cam all the time, the other end and spring offset, cam often turns around, silk cylinder realizes axial once at the uniform velocity moving back and forth under the acting in conjunction of cam and spring, thus ensure that wire electrode evenly can arrange silk on silk cylinder, cam is driven by worm-and-wheel gear, and worm screw is coaxial with main shaft, and main shaft is connected with servomotor by shaft coupling, and servomotor is controlled by the turn signal of the silk cylinder of controller and signal picker collection, the distance that controller controls silk cylinder positive movement is greater than counter motion distance, thus passes through the not equity of to-and-fro thread, and the trace realizing wire electrode advances, to offset the loss of wire electrode.
8. the gradual wire drive device of Wire EDM wire electrode according to claim 7, it is characterized in that the worm gear of described worm-and-wheel gear is coaxially connected with same shaft bevel gears, engage with the driving bevel gear on camshaft with shaft bevel gears and drive cam shaft is rotated.
9. the gradual wire drive device of Wire EDM wire electrode according to claim 7, when it is characterized in that a silk cylinder in two described silk cylinders rotates under drive motors drives, the resistance needed for another cylinder produces realizes controlling the tension force of wire electrode.
10. the gradual wire drive device of Wire EDM wire electrode according to claim 7, is characterized in that the difference of described positive movement Distance geometry counter motion distance is at least 1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566991.4A CN105195843B (en) | 2015-09-09 | 2015-09-09 | Electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566991.4A CN105195843B (en) | 2015-09-09 | 2015-09-09 | Electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105195843A true CN105195843A (en) | 2015-12-30 |
| CN105195843B CN105195843B (en) | 2017-04-12 |
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| CN201510566991.4A Active CN105195843B (en) | 2015-09-09 | 2015-09-09 | Electrode wire reciprocating progressive type wire winding method and device for WEDM (wire cut electrical discharge machining) |
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| CN106041235A (en) * | 2016-07-11 | 2016-10-26 | 南京航空航天大学 | Follow-up auxiliary anode electrolytic wire cut machining system and method |
| CN107570824A (en) * | 2017-09-22 | 2018-01-12 | 北京东兴润滑剂有限公司 | The unidirectional wire electric spark wire cutting method of double and system |
| WO2018145549A1 (en) * | 2017-02-08 | 2018-08-16 | 何赐文 | Bidirectional and unidirectional spark-erosion wire cutting method |
| CN109175557A (en) * | 2018-10-30 | 2019-01-11 | 中国工程物理研究院机械制造工艺研究所 | A kind of wire cutting wire drive device |
| CN109332829A (en) * | 2018-11-30 | 2019-02-15 | 自贡市嘉特数控机械制造有限公司 | The control device and wire-walking method of Wire Electrode WEDM |
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| CN110026632A (en) * | 2019-05-21 | 2019-07-19 | 南京工程学院 | Scalable Wire EDM wire module and its control system and control method |
| CN112093545A (en) * | 2020-08-15 | 2020-12-18 | 洛阳生波尔真空装备有限公司 | Tension control system based on winding coating machine process under high vacuum environment |
| US11904398B2 (en) | 2020-07-03 | 2024-02-20 | Agie Charmilles Sa | Wire management method for high-speed wire cutting |
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| CN106041235B (en) * | 2016-07-11 | 2018-01-23 | 南京航空航天大学 | Trailing type impressed current anode is electrolysed linear cutter system and method |
| CN106041235A (en) * | 2016-07-11 | 2016-10-26 | 南京航空航天大学 | Follow-up auxiliary anode electrolytic wire cut machining system and method |
| WO2018145549A1 (en) * | 2017-02-08 | 2018-08-16 | 何赐文 | Bidirectional and unidirectional spark-erosion wire cutting method |
| CN107570824B (en) * | 2017-09-22 | 2019-09-20 | 北京东兴润滑剂有限公司 | The unidirectional wire electric spark wire cutting method of double-station and system |
| CN107570824A (en) * | 2017-09-22 | 2018-01-12 | 北京东兴润滑剂有限公司 | The unidirectional wire electric spark wire cutting method of double and system |
| CN109175557B (en) * | 2018-10-30 | 2020-06-05 | 中国工程物理研究院机械制造工艺研究所 | Wire cutting wire feeding device |
| CN109175557A (en) * | 2018-10-30 | 2019-01-11 | 中国工程物理研究院机械制造工艺研究所 | A kind of wire cutting wire drive device |
| CN109332830A (en) * | 2018-11-30 | 2019-02-15 | 自贡市嘉特数控机械制造有限公司 | The wire drive device and method of to-and-fro wire-travelling type electric spark linear cutting machine |
| CN109332829A (en) * | 2018-11-30 | 2019-02-15 | 自贡市嘉特数控机械制造有限公司 | The control device and wire-walking method of Wire Electrode WEDM |
| CN109332829B (en) * | 2018-11-30 | 2023-08-04 | 自贡市嘉特数控机械制造有限公司 | Wire feeding method for wire electrode of wire cut electric discharge machine |
| CN109332830B (en) * | 2018-11-30 | 2023-09-05 | 自贡市嘉特数控机械制造有限公司 | Wire feeding method of reciprocating wire feeding type wire cut electric discharge machine |
| CN110026632A (en) * | 2019-05-21 | 2019-07-19 | 南京工程学院 | Scalable Wire EDM wire module and its control system and control method |
| CN110026632B (en) * | 2019-05-21 | 2020-12-01 | 南京工程学院 | Telescopic wire cut Electrical Discharge Machining (EDM) wire feeding module and control system and control method thereof |
| US11904398B2 (en) | 2020-07-03 | 2024-02-20 | Agie Charmilles Sa | Wire management method for high-speed wire cutting |
| CN112093545A (en) * | 2020-08-15 | 2020-12-18 | 洛阳生波尔真空装备有限公司 | Tension control system based on winding coating machine process under high vacuum environment |
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